This order treats a narrowly described type of lightweight backpack (max 0.25 kg, pack-away pocket, zipper, removable hydration sleeve and/or exit port) as eligible for the tariff concession listed as item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 1 December 2011 until revoked. It affects importers (who may face lower customs duty) and Customs officials (who must verify the product matches the listed criteria). Compliance requires demonstrating the goods meet the specified physical criteria; revocation can be made under the Customs Act.